Balance



w. c. sEYTER Filed April 2 1926 FLgfl] Sept. 14 ,1926. v

INVEN'Q Q By Attorneys,

1 i W. l

Patented Sept. 14, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM C. SEYTER, OF JERSEY CITY HEIGHTS, NEW JERSEY, ASSIGNOR TO THETORSION BALANCE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

. BALANCE.

The present invention relates to analytical balances or the like, andmore particularly to the rider rod construction in such devices, andaims to provide certain improvements therein.

In the manufacture of balances of the type wherein the rider on the beamis picked up or moved along the beam by a rider hook, which, in itslimiting engagingposition, is adapted to be guided parallel to the beam,it occasionally happens, in view of the difliculties encountered inmanufacturing, that true parallelism between the rider rod at everypoint along the beam and the beam so as to insure engagement of the.

rider by the rider hook. These various improvements I accomplish byproviding the rider rodrwith a supplemental rod adapted to co-operatewith an abutment for limiting the position of the engaging end of therider hook with respect to the balance beam, said supplemental rod beingadjustable to vary the degree of parallelism between it and the riderrod, whereby the supplemental rod will guide the rider hook paralleltothe balance beam. The invention also contemplates other features ofnovelty which will be hereinafter more fully described. I v

In the accompanying drawings wherein I have shown two preferredembodiments of my invention,

'Figurel is a front elevation of an analytical balance embodying myinvention.

Fig. 2 is an elevation on anenlarged scale of. the balance beam andrider rod construction of the balance shown in Figure 1, the enclosingcase being omitted.

Fig. 3 is a transverse section taken on the line 3-3 of Fig. 2.

Fig. 4 is a top plan view of a modified form of rider rod construction.

Fig. 5 is a transverse section taken on the l1ne 5-5 of Fig. 4.

F ig. 6 is a fractional top plan view of which is mounted a beam arrestB, and an equal arm. balance beam C, from the ends 0f Wl1lCh aresuspended the balance pans D, all mounted within an enclosing case E.

Extending through one wall of the enclos ng case and supported by arider rod carrier F mounted upon the column A is a slidable rider rod Gfitted with a rider hook H and a supplemental guide rod J. Thissupplemental rod is adapted by'engagement with the rider rod carrier tolimit the positlon of the engaging end of the rider hook with respect tothe balance beam, and to guide said rider. hook end parallel to saidbeam. It is also adapted, through engagement with an abutment K mountedon the rider hook carrier, to limit the disengaging position of therider hook.

The rider hook H comprises a part It ex tending through and adjustablewith respect to the rider rod Gr by a set screw 9', a part h extendingat substantially a right angle to the part it and of substantiallygreater length than said part, and a hook end part b extending at rightangles to the part h adapted to ride over the top of the balance beam C.The hook end 7;. is fitted with a pin or hook 72 extending parallel tothe balance beam and adapted to engage the rider 0 thereon. Preferablythe rider hook H is made of thin metal bendable about the angleconnecting the parts 72. and h, whereby the part 71." may be bent toextend truly parallel to both the plane of the top of the balance beamand the planes of the faces of said beam.

The supplemental rod J has its ends j bent at right angles andadjustably mounted within openings in the rider rod G and adapted to beheld in adjusted position by set screws g. The ends 7', it is to beunderstood, may extend into the openings in the rider rod to differentdegrees, thereby causing the rod J to extend out of true parallelismwith the rider rod G. By this means the supplemental rod J, when inguiding position. may serve to correct any lack of parallelism due tomanufacturing causes between the rider rod and the balance beam.

In Figs. l and 5 I have shown the invention applied to a rider hook adaiteil to move a slide weight L along the balance beam B. In thisconstruction the rider hook end M consists of a substantially U.- shapedframe, the arms of which have undercut grooves adapted to straddle tlebalance beam and engage over the slide weight L to move same over thebalance beam. In other particulars the rider hook H is similar to therider ii in Figs. 1 to 3. Likewise. the supplemental rod J is adaptedfor adju tment with respect to the rider rod in the same manner hcreinbelore described in cor section with the rod The guide abutment in Figs.4.- and 5, however, is somewhat diiierent from that previouslydescriled, and cons s of an iclined member over which i i adapted toride, it being a iparent that if the ends oi the roo J are adjusted toditferent degrees on the rider rod, that as the supplemental rod movesover the inclined member the rider hook M will. be ca .l t move Out ortrue parallelism with lsQQQ'Jb to the rider rod. itleing obvious that asthe rod J- is moved over the incline N that it will ride up thereon ordown thereover, depending upon the direction in which the rod is moved.It'desired, the abutment I? may be formed as a continuation of" theclamping member 0 adapted to hold the.

rider rod against displacement from. its groore in the rider rodcarrier.

From the foregoing descriptions it will be apparent that it because offaulty iii-anuiacture or other cause, the rider rod and top, edges ofthe balance beam are not in true parallelism whereby the rider book willbe certain to engage the rider at every point along the balance beam,tha this delect may be readily remedied either by varying the adjustmentof the supplemental. slide rod, or by bending" the long arm or the riderhook into true parallelism with the beam, or by adjustment of both saidmeans. It will also be. apparent that in view of the length of the riderhook part ll in Fig, 2. and the corresponding part of the rider H" inFig. 4. the single rider hook will be adapted to engage the rider at anypoint along the balance beam.

llhile I have shown and described certain preferred embodiments. of myinvention. it will, be understood that I do not wishto be limited to theexact structure disclosed, since modifications thereof may be resortedto without departing from the. spirit of the invention.

'hat I. claim is:

1. irbalance or weighing scale comprising an enclosing case, a balancebeam along which a rider is movable, a slidable rider rod, a rider hookcarried thereby, and means for varying the limiting positions of theengaging end of the rider hook with respect to the balance beam.

2. A balance or weighing scale comprising an enclosing case, a balancebeam along which a rider is movable, a slidable rider rod, a rider hookcarried thereby, and means for limiting the position of the engaging endor the rider hook with respect to the balance beam and for insuring themovement of said rider hook end when in its limiting position, parallelto the balance beam.

3. A balance or weighing scale comprising an enclosing case, a balancebeam along which a rider is movable, a slid'able rider rod, a rider hookcarried thereby, and means for varying the limiting positions of theengaging end of the rider hookwith respect to the balance beam and forinsuring the movement of said rider hook end when in its limitingposition, parallel to the balance beam.

4:. A balance or weighing scale comprising an enclosing case, a balancebeamv along which a rider is movable, a slidable rider rod, a rider hookcarried thereby, andan adjustable rod carriedby the rider rod forvarying the limiting positions of the engaging end of the rider hookwith respect to the balance beam.

A balance or weighing scale comprising an enclosing case, a balance beamalong which a rider is movable, a slid'able rider rod, a rider hookcarried thereby, a supplemental rod carried by the riderrod 00-operating with an abutment for limiting the position of the engaging endof the rider hook with respect to the balance beam, said supplementalrod being adjustable to vary thedegree ol parallelism between it and therider rod, and said supplemental rod being adapted to guide said riderhookparallel to the balance beam.

6. A balance or weighing scale comprising an enclosing case, a balancebeam along which a rider is movable and a slidable rider rod having arider hook carried thereby, means tor-limiting the position of theengaging end of the rider hook with respect to the balance beam, saidrider hook having a part thereof extending at an anglc from the riderrod, and another part thereof of;

substantial length extending substantially parallel, to the rider rod,said last-named part of the rider book being adjustable to extend.parallel to both the plane of the top of the balance beam and the planesof the faces of the balance beam.

7. A balance or weighing scale comprising an enclosing case, an, equalarm, balance beam along both arms of which a rider is movable, aslidable rider rod, a rider rod support mounted about midway the lengthof the balance beam, and a rider hook carried by the rider rod adaptedto engage a rider at any point on the balance beam.

8. A balance or Weighing scale comprising an enclosing case, an equalarm balance beam along both arms of which a rider is movable, a slidablerider rod, a rider rod support mounted about midway the length of thebalance beam, and a rider hook car- 10 any point on the balance beam.

In witness whereof, I have hereunto 15 signed my name.

WILLIAM C. SEYTER.

